本示例使用的发卡器：Android Linux RFID读写器NFC发卡器WEB可编程NDEF文本/网址/海报-淘宝网 (taobao.com)
package com.usbreadertest;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.reader.ourmifare;
public class NdefwifiActivity extends AppCompatActivity {
private TextView tv;
private EditText ctrwifiname;
private Spinner ctrauth;
private Spinner ctrkeyalgorithm;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ndef_wifi);
androidx.appcompat.widget.Toolbar toolbar=findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
tv = findViewById(R.id.sample_text);
tv.setText("操作结果");
ctrauth=findViewById(R.id.spin_Selauthtype);
ctrauth.setSelection(7);
ctrkeyalgorithm=findViewById(R.id.spin_Selkeytype);
ctrkeyalgorithm.setSelection(4);
ctrwifiname=findViewById(R.id.Edittextname);
ctrwifiname.requestFocus();
}
@Override
public void onBackPressed(){
super.onBackPressed();
finish();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId()==android.R.id.home){
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
public void retmain(View view)
{
finish();
}
public void writewifitag(View view) {
String wifinamestr=ctrwifiname.getText().toString().trim();
if (wifinamestr.length()<1){
tv.setText("请输入网络名称！");
ctrwifiname.requestFocus();
return;
}
byte[] wifinamebyte=wifinamestr.getBytes();
int wifinamelen=wifinamebyte.length;
int authtype=(int)(ctrauth.getSelectedItemId());
int keytype=(int)(ctrkeyalgorithm.getSelectedItemId());
EditText ctrwifikey=findViewById(R.id.Edittextkey);
String wifikeystr=ctrwifikey.getText().toString().trim();
byte[] wifikeybyte=wifikeystr.getBytes();
int keylen=wifikeybyte.length;
ourmifare.tagbufclear(); //清空数据缓冲
byte status=ourmifare.tagbufaddwifi(wifinamebyte,wifinamelen,authtype,keytype,wifikeybyte,keylen); //将要写的NDEF信息加入到写缓冲
if (status==0){
int tagtype=NdefTextActivity.CheckCardType(); //检测发卡器上的标签类型
if(tagtype==-1){
tv.setText("发卡器感应区未发现有效的NDEF标签！");
return;
}
byte[] mypiccserial=new byte[8];
status=NdefTextActivity.WriteTag(tagtype,mypiccserial); //将已生成的NDEF缓冲数据写入不同的标签
String dispinfo=NdefTextActivity.dispwritetag(status ,mypiccserial,tagtype);
tv.setText(dispinfo);
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="3dp"
tools:context=".NdefwifiActivity">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="?attr/colorPrimary"
app:navigationIcon="@drawable/baseline_arrow_back_ios_24"
app:titleTextColor="@color/white"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteY="0dp">
<TextView
android:id="@+id/TextViewlabelDispleft"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="返回"
android:textColor="@color/white"
android:textSize="16sp"
android:gravity="center"
android:onClick="retmain" />
<TextView
android:id="@+id/TextViewlabelDisp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="NDEF_WIFI "
android:textColor="@color/white"
android:textSize="16sp"
android:gravity="center_horizontal|right|center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/TextViewlabelDispleft"
app:layout_constraintTop_toTopOf="parent" />
</androidx.appcompat.widget.Toolbar>
<TextView
android:id="@+id/sample_text"
android:layout_width="fill_parent"
android:layout_height="150dp"
android:padding="3dp"
android:text="操作结果"
android:textSize="12sp"
android:background="@drawable/shape4border"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
<ScrollView
android:id="@+id/scrollViewIC"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="5dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/toolbar"
app:layout_constraintBottom_toTopOf="@+id/sample_text"
android:scrollbars="horizontal"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="3dp" >
<TextView
android:id="@+id/textlablename"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="网络名称:"
android:textSize="16sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/Edittextname"
android:layout_width="330dp"
android:layout_height="wrap_content"
android:textSize="16sp"
android:gravity="left"
android:text=""
app:layout_constraintBottom_toBottomOf="@+id/textlablename"
app:layout_constraintLeft_toRightOf="@+id/textlablename"
app:layout_constraintTop_toTopOf="@+id/textlablename" />
<TextView
android:id="@+id/textlableauthtype"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="认证方式:"
android:textSize="16sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textlablename" />
<Spinner
android:id="@+id/spin_Selauthtype"
android:layout_width="330dp"
android:layout_height="wrap_content"
android:entries="@array/wifiauthtype"
android:theme="@style/my_spinner_style"
app:layout_constraintBottom_toBottomOf="@+id/textlableauthtype"
app:layout_constraintLeft_toRightOf="@+id/textlableauthtype"
app:layout_constraintTop_toTopOf="@+id/textlableauthtype" />
<TextView
android:id="@+id/textlablekeytype"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="加密算法:"
android:textSize="16sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textlableauthtype" />
<Spinner
android:id="@+id/spin_Selkeytype"
android:layout_width="330dp"
android:layout_height="wrap_content"
android:entries="@array/wifikeytype"
android:theme="@style/my_spinner_style"
app:layout_constraintBottom_toBottomOf="@+id/textlablekeytype"
app:layout_constraintLeft_toRightOf="@+id/textlablekeytype"
app:layout_constraintTop_toTopOf="@+id/textlablekeytype" />
<TextView
android:id="@+id/textlableahostkey"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="连接密码:"
android:textSize="16sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textlablekeytype" />
<EditText
android:id="@+id/Edittextkey"
android:layout_width="330dp"
android:layout_height="wrap_content"
android:textSize="16sp"
android:gravity="left"
android:text=""
android:inputType="textPassword"
app:layout_constraintBottom_toBottomOf="@+id/textlableahostkey"
app:layout_constraintLeft_toRightOf="@+id/textlableahostkey"
app:layout_constraintTop_toTopOf="@+id/textlableahostkey" />
<Button
android:id="@+id/butt_Writewifitag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:onClick="writewifitag"
android:text="将以上WIFI连接信息写入标签"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textlableahostkey" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
